body {
    margin: 0;
    padding: 0;
    background: #232a34;
}

.container {
    display: flex;
    flex-flow: wrap;
    flex-direction: column;
    align-items: center;
    margin: 0 auto;
    height: 100vh;
    width: 100vh;
    align-content: center;
    align-items: stretch;
    justify-content: center;
}

.container img {
    width: calc(100vw/6);
    height: auto;
    transition: all 1s linear;
}

.container div:nth-child(2n) img{
    border-top-left-radius: 27%;
    border-top-right-radius: 32%;
    border-bottom-left-radius: 34%;
    border-bottom-right-radius: 26%;
} 

.container div:nth-child(3n) img{
    border-top-left-radius: 21%;
    border-top-right-radius: 43%;
    border-bottom-left-radius: 21%;
    border-bottom-right-radius: 29%;
} 
.container div:nth-child(5n) img{
    border-top-left-radius: 41%;
    border-top-right-radius: 30%;
    border-bottom-left-radius: 37%;
    border-bottom-right-radius: 23%;
} 
.container div:nth-child(7n) img{
    border-top-left-radius: 38%;
    border-top-right-radius: 20%;
    border-bottom-left-radius: 21%;
    border-bottom-right-radius: 38%;
} 
.container div:nth-child(11n) img{
    border-top-left-radius: 41%;
    border-top-right-radius: 47%;
    border-bottom-left-radius: 48%;
    border-bottom-right-radius: 47%;
}

.container div:nth-child(13n) img{
    border-top-left-radius: 31%;
    border-top-right-radius: 67%;
    border-bottom-left-radius: 48%;
    border-bottom-right-radius: 57%;
}

.container div:first-child img {
    border-top-left-radius: 51%;
    border-top-right-radius: 57%;
    border-bottom-left-radius: 58%;
    border-bottom-right-radius: 57%;
}

.container div img:hover {
    border-top-left-radius: 0;
    border-top-right-radius: 0;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}